$OpenBSD: patch-wrlib_png_c,v 1.1 2011/07/08 20:38:01 naddy Exp $

Fix build with png-1.5.

--- wrlib/png.c.orig	Tue Jul  5 22:30:42 2011
+++ wrlib/png.c	Tue Jul  5 22:31:03 2011
@@ -97,7 +97,7 @@ RLoadPNG(RContext *context, char *file, int index)
     }
 
     RErrorCode = RERR_INTERNAL;
-    if (setjmp(png->jmpbuf)) {
+    if (setjmp(png_jmpbuf(png))) {
         fclose(f);
         png_destroy_read_struct(&png, &pinfo, &einfo);
         if (image)
